Ishmael vs heretic

Ishmael and heretic both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ishmael	Yes	No	No	No
heretic	Yes	No	No	No

As nouns, heretic is a hyponym of Ishmael; that is, heretic is a word with a more specific, narrower meaning than Ishmael:

Ishmael: a person who is rejected (from society or home)
heretic: a person who holds religious beliefs in conflict with the dogma of the Roman Catholic Church

Other hyponyms of Ishmael include misbeliever, religious outcast, leper, Harijan, untouchable.

Ishmael (noun)	heretic (noun)
(Old Testament) the son of Abraham who was cast out after the birth of Isaac; considered the forebear of 12 Arabian tribes	a person who holds religious beliefs in conflict with the dogma of the Roman Catholic Church
a person who is rejected (from society or home)	a person who holds unorthodox opinions in any field (not merely religion)